characterised by modifying the teaching program in response to a wrong answer, e.g. repeating the question or supplying a further explanation

Full Title

Electrically-operated teaching apparatus or devices working with questions and answers (mechanically operated G09B3/00; computing arrangements G06F) > of the type wherein the student is expected to construct an answer to the question which is presented or wherein the machine gives an answer to the question presented by a student > characterised by modifying the teaching program in response to a wrong answer, e.g. repeating the question or supplying a further explanation